20-30 glowing orange orbs travelled slowly across I-55 near the Meremec River

While driving home, I and my family observed 20-30 orange glowing balls travel slowly through the sky across I-55 and the Meremac River from SW to NE.

The altitude is not known, but the event lasted some 10 minutes. My wife was able to video record most of the incident.

Others stopped to view the happening, which actually led to a multiple vehicle accident. The objects where absolutely silent and sequentially disappeared at a certain point in the sky when they finally reached it.

Was NOT and airplane or helicopter! Seemed to be far to high to be chinese lanterns.